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- [9] Organic carbon stock in topsoil of Jiangsu Province, China, and the recent trend of carbon sequestration[J]. PAN Gen xing 1,* , LI Lian qing 1, ZHANG Qi 1, WANG Xu kui 2, SUN Xing bin 3, XU Xiao bo 4, JIANG Ding an 5 (1. Institute of Resources, Ecosystem and Environment of Agriculture, Nanjing Agricultural University, Nanjing 210095, China.;2. Extension Center of Soil and Fertilizer Technology, Department of Agriculture, Jiangsu Administration, Nanjing 210000, China;3. Extension Center of Soil a